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  <pre class="prettyprint lang-js"><span id='Ext-util-Grouper'>/**
</span> * @class Ext.util.Grouper
 * @extends Ext.util.Sorter

Represents a single grouper that can be applied to a Store. The grouper works
in the same fashion as the {@link Ext.util.Sorter}.

 * @markdown
 */
 
Ext.define('Ext.util.Grouper', {

    /* Begin Definitions */

    extend: 'Ext.util.Sorter',

    /* End Definitions */

<span id='Ext-util-Grouper-method-getGroupString'>    /**
</span>     * Returns the value for grouping to be used.
     * @param {Ext.data.Model} instance The Model instance
     * @return {String} The group string for this model
     */
    getGroupString: function(instance) {
        return instance.get(this.property);
    }
});</pre>
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